import { useEffect, useState } from "react";
import { Copy, Dice5, RefreshCw } from "lucide-react";
import Button from "./Button";
import Dialog from "./Dialog";
import DismissibleAlert from "./DismissibleAlert";
import FormField from "./FormField";
import IconButton from "./IconButton";
import ToggleSwitch from "./ToggleSwitch";
import {
  DEFAULT_PASSWORD_GENERATOR_OPTIONS,
  generateSecurePassword,
  PasswordGeneratorError,
  type PasswordGeneratorErrorCode,
  type PasswordGeneratorOptions
} from "./passwordGenerator";
import { usePlatformLanguage } from "../i18n/LanguageContext";
import type { PlatformInterfaceIdentityProps } from "../types";

const GENERATION_ERROR_LABELS: Record<PasswordGeneratorErrorCode, string> = {
  "invalid-length": "i18n:govoplan-core.password_length_must_be_between_12_and_128_character.4d147c07",
  "no-character-set": "i18n:govoplan-core.select_at_least_one_character_set.6150a9c2",
  "length-too-short": "i18n:govoplan-core.password_length_is_too_short_for_the_selected_charact.1d7845f1",
  "invalid-random-range": "i18n:govoplan-core.password_generation_could_not_use_the_selected_setti.c2f0da38",
  "secure-random-unavailable": "i18n:govoplan-core.secure_browser_password_generation_is_unavailable.55275f10"
};

export type PasswordGeneratorDialogProps = PlatformInterfaceIdentityProps & {
  open: boolean;
  initialOptions?: Partial<PasswordGeneratorOptions>;
  onUse: (password: string) => void;
  onClose: () => void;
};

export default function PasswordGeneratorDialog({
  open,
  initialOptions,
  helpContextId,
  helpModuleId,
  helpTopicId,
  onUse,
  onClose
}: PasswordGeneratorDialogProps) {
  const { translateText } = usePlatformLanguage();
  const [options, setOptions] = useState<PasswordGeneratorOptions>({
    ...DEFAULT_PASSWORD_GENERATOR_OPTIONS,
    ...initialOptions
  });
  const [candidate, setCandidate] = useState("");
  const [error, setError] = useState("");
  const [copied, setCopied] = useState(false);

  const generate = () => {
    try {
      setCandidate(generateSecurePassword(options));
      setError("");
      setCopied(false);
    } catch (generationError) {
      setCandidate("");
      setError(translateText(
        generationError instanceof PasswordGeneratorError
          ? GENERATION_ERROR_LABELS[generationError.code]
          : "i18n:govoplan-core.password_generation_failed.5a40a004"
      ));
    }
  };

  useEffect(() => {
    if (!open) return;
    setOptions({ ...DEFAULT_PASSWORD_GENERATOR_OPTIONS, ...initialOptions });
  }, [initialOptions, open]);

  useEffect(() => {
    if (open) generate();
    // Generation must react to the exact selected candidate policy.
    // eslint-disable-next-line react-hooks/exhaustive-deps
  }, [open, options]);

  const setOption = <K extends keyof PasswordGeneratorOptions>(
    key: K,
    value: PasswordGeneratorOptions[K]
  ) => setOptions((current) => ({ ...current, [key]: value }));

  const copy = async () => {
    if (!candidate || typeof navigator === "undefined" || !navigator.clipboard?.writeText) return;
    try {
      await navigator.clipboard.writeText(candidate);
      setCopied(true);
    } catch {
      setCopied(false);
      setError(translateText("i18n:govoplan-core.the_generated_password_could_not_be_copied_select_it.569e025e"));
    }
  };

  return (
    <Dialog
      open={open}
      title="i18n:govoplan-core.generate_password.bd5bede8"
      className="password-generator-dialog"
      bodyClassName="password-generator-body"
      footerClassName="button-row compact-actions"
      portal
      helpContextId={helpContextId}
      helpModuleId={helpModuleId}
      helpTopicId={helpTopicId}
      onClose={onClose}
      footer={(
        <>
          <Button type="button" onClick={onClose}>i18n:govoplan-core.cancel.77dfd213</Button>
          <Button
            type="button"
            variant="primary"
            disabled={!candidate}
            helpContextId={helpContextId}
            helpModuleId={helpModuleId}
            helpTopicId={helpTopicId}
            onClick={() => {
              if (!candidate) return;
              onUse(candidate);
              onClose();
            }}
          >
            <Dice5 size={16} aria-hidden="true" /> i18n:govoplan-core.use_password.2e1913a6
          </Button>
        </>
      )}
    >
      {error ? <DismissibleAlert tone="danger" resetKey={error}>{error}</DismissibleAlert> : null}
      <div className="password-generator-options">
        <FormField label="i18n:govoplan-core.length.adc95605" helpContextId={helpContextId} helpModuleId={helpModuleId} helpTopicId={helpTopicId}>
          <input
            type="number"
            min={12}
            max={128}
            step={1}
            value={options.length}
            onChange={(event) => setOption("length", Number(event.target.value))}
          />
        </FormField>
        <div className="password-generator-character-sets" aria-label={translateText("i18n:govoplan-core.character_sets.db6efda2")}>
          <ToggleSwitch label="i18n:govoplan-core.lowercase.3b677a18" checked={options.lowercase} onChange={(checked) => setOption("lowercase", checked)} helpContextId={helpContextId} helpModuleId={helpModuleId} helpTopicId={helpTopicId} />
          <ToggleSwitch label="i18n:govoplan-core.uppercase.b463d690" checked={options.uppercase} onChange={(checked) => setOption("uppercase", checked)} helpContextId={helpContextId} helpModuleId={helpModuleId} helpTopicId={helpTopicId} />
          <ToggleSwitch label="i18n:govoplan-core.digits.9cd500d3" checked={options.digits} onChange={(checked) => setOption("digits", checked)} helpContextId={helpContextId} helpModuleId={helpModuleId} helpTopicId={helpTopicId} />
          <ToggleSwitch label="i18n:govoplan-core.symbols.9491fc41" checked={options.symbols} onChange={(checked) => setOption("symbols", checked)} helpContextId={helpContextId} helpModuleId={helpModuleId} helpTopicId={helpTopicId} />
        </div>
      </div>
      <FormField label="i18n:govoplan-core.generated_password.78461854" helpContextId={helpContextId} helpModuleId={helpModuleId} helpTopicId={helpTopicId}>
        <div className="password-generator-result">
          <input
            type="text"
            value={candidate}
            readOnly
            autoComplete="off"
            spellCheck={false}
          />
          <IconButton
            label={copied ? "i18n:govoplan-core.copied.8d525e5f" : "i18n:govoplan-core.copy_generated_password.180ca876"}
            icon={<Copy size={16} />}
            onClick={() => void copy()}
            disabled={!candidate || typeof navigator === "undefined" || !navigator.clipboard?.writeText}
            helpContextId={helpContextId}
            helpModuleId={helpModuleId}
            helpTopicId={helpTopicId}
          />
          <IconButton
            label="i18n:govoplan-core.generate_another_password.d99fc019"
            icon={<RefreshCw size={16} />}
            onClick={generate}
            helpContextId={helpContextId}
            helpModuleId={helpModuleId}
            helpTopicId={helpTopicId}
          />
        </div>
      </FormField>
      <p className="password-generator-note">
        i18n:govoplan-core.the_current_field_is_not_changed_until_you_choose_use_pass.447608e7
      </p>
    </Dialog>
  );
}